Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/stm32/stm32h7/STM32H745_CM4/HSEM/HSEM_RLR8#0x0
HSEM Read lock register
Semaphore ProcessID
Semaphore COREID
Lock indication
https://github.com/modm-io/cmsis-svd-stm32